If you watch the Vice series that I links, I think many opinions would change on this subject. The HBO ondemand is different than the you tube version but provides all the info.
They discuss both sides of the argument, they fly to different parts of the world and actual data collecting of information. They provide interviews with the deniers and the pro side.
I don't know what more evidence you need. It is at the rate of change that is quite compelling. Sure you can look at historical data, which none proves things changing so rapidly.